How you migrated ? What method you used ? In Linux/Unix-Like OSs where "everything is a file" it's very easy to migrate with a simple command, but Windows (OS) is not the same. Depend on the method you used, it is likely this could be a Windows problem and not Ubuntu/Linux.
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NikThMay 30 '14 at 12:10

@NikTh 1- Reduced the original HDD partition where was the OS win8. 2 - I made an image of the partition 3 - i restored the image in an partition but this time in the SSD. That's all my migration process.
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sebarockerMay 30 '14 at 13:31

As I have said, this is likely a Windows problem due to its bootloader. Try to restore Windows bootloader to Disk's MBR and then again, restore Grub.
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NikThMay 30 '14 at 21:39